An ounce of prevention is worth a pound (or, in this case, two hours) of cure. Use high temp primer, paint, or even just a thin coat of anti-seize on the hats. If you're in a corrosive area, maybe all three.

From the wear ridge I see in the pics, new rotors might not be far off anyways.

I sanded down my rotors and calipers and painted them using this stuff. Came out absolutely mint and its holding up very well. Looks OEM straight off the showroom floor. I'll post a pic when I get a chance.

I sanded down my rotors and calipers and painted them using this stuff. Came out absolutely mint and its holding up very well. Looks OEM straight off the showroom floor. I'll post a pic when I get a chance.